Fancy Button Pattern #4

With 1st Color, ch 3, 12 d c in 1st st of ch, without joining rows, work 3 rows of s c increasing a sufficient number of times to keep work flat, break thread. Join 2nd Color, ch 2, 2 s d c in same st, * skip 1 s c, sl st in next st, ch 2, 2 s d c in same st, repeat from * all around, break thread. With 1st Color, pick up each s c under 2nd Color, work rows of s c decreasing as necessary to fit back of mold.